1
A receiver joins a group; leaf Router C sends a join message toward the RP.
2
The RP puts a link to Router C in its outgoing interface list.
3
A source sends data; Router A encapsulates the data in a register message and sends it to the RP.
4
The RP forwards the data down the shared tree to Router C and sends a join message toward the source.
At this point, data might arrive twice at Router C, once encapsulated and once natively.
5
When data arrives natively (unencapsulated) at the RP, it sends a register-stop message to Router A.
6
By default, reception of the first data packet prompts Router C to send a join message toward the source.
7
When Router C receives data on (S, G), it sends a prune message for the source up the shared tree.
8
The RP deletes the link to Router C from the outgoing interface of (S, G). The RP triggers a prune message
toward the source.
Join and prune messages are sent for sources and RPs. They are sent hop-by-hop and are processed by each
PIM device along the path to the source or RP. Register and register-stop messages are not sent hop-by-hop.
They are sent by the designated router that is directly connected to a source and are received by the RP for
the group.
Multiple sources sending to groups use the shared tree.
You can configure the PIM device to stay on the shared tree. You can configure the PIM device to stay on
the shared tree. For more information, see Delaying the Use of PIM Shortest-Path Tree (CLI), on page 151.
Default PIM Routing Configuration
This table displays the default PIM routing configuration for the device.
Table 14: Default Multicast Routing Configuration
Default SettingFeature
Disabled on all interfaces.Multicast routing
Version 2.PIM version
No mode is defined.PIM mode
None configured.PIM stub routing
None configured.PIM RP address
Disabled.PIM domain border
None.PIM multicast boundary
Disabled.Candidate BSRs
Disabled.Candidate RPs
0 kb/s.Shortest-path tree threshold rate
IP Multicast Routing Configuration Guide, Cisco IOS XE Release 3SE (Catalyst 3650 Switches)
OL-29890-01 123
Configuring PIM
Default PIM Routing Configuration
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